I never thought that building in public would be so fun. I post regularly pictures of my new project.
I use to be ashamed of posting WIP screenshots but now I try to post regularly(that is when I don't forget) and I already got people liking and following me.
Not many but a few.
Obviously , I am not confusing twitter engagement with business need nor idea validation but it feels good to share and see what other people are working on.
Another side effect is that it takes some pressure off from simply launching a new product and awaiting feedback.
In a way building in public is like doing a series of mini launches.